@@ -25,6 +25,7 @@ cc uxn.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -Wno-unknown-pragmas -o uxn

 - `( comment )`, toggle parsing on/off

 - `|0010`, move to position in the program

+- `"hello`, push literal bytes for word "hello"

 ```

 ;value ( alloc a zero-page variable )

@@ -29,7 +29,7 @@ contexts:

     - match: '\;(\S+)\s?'

       scope: string.control

       pop: true

-    - match: '\_(\S+)\s?'

+    - match: '\@(\S+)\s?'

       scope: string.control

       pop: true

     - match: '\,(\S+)\s?'

@@ -38,6 +38,9 @@ contexts:

     - match: '\.(\S+)\s?'

       scope: keyword.control

       pop: true

+    - match: '\"(\S+)\s?'

+      scope: keyword.control

+      pop: true

   comments:

     - match: '\('

@@ -1,24 +1,27 @@

 ( blank project )

 ;variable1

-;variable2

-_constant1 abcd

+:constant1 9abc

 |0100 ( -------------------------------- )

-:RESET BRK

+@RESET

-|c000 ( -------------------------------- )

+,abcd

+

+BRK ( RESET-END )

-:FRAME ( FRAME-START )

+|c000 ( -------------------------------- )

+@FRAME ( FRAME-START )

+,abcd

 BRK ( FRAME-END )

 |d000 ( -------------------------------- )

-:ERROR BRK

+@ERROR BRK

 |FFFA ( -------------------------------- )

@@ -1,30 +1,21 @@

 ( blank project )

 ;variable1

-:constant1 9abc

+:dev1r FFF0

+:dev1w FFF1

-|0100 ( -------------------------------- )

+|0100 @RESET

-@RESET

+"hello 

-,abcd

+,dev1w STR

+,dev1w STR

+,dev1w STR

+,dev1w STR

+,dev1w STR

-BRK ( RESET-END )

+BRK ( RESET )

-|c000 ( -------------------------------- )

-

-@FRAME ( FRAME-START )

-

-,abcd

-

-BRK ( FRAME-END )

-

-|d000 ( -------------------------------- )

-

-@ERROR BRK

-

-|FFFA ( -------------------------------- )

-

-.RESET

-.FRAME

-.ERROR

+|c000 @FRAME BRK 

+|d000 @ERROR BRK 

+|FFFA .RESET .FRAME .ERROR

@@ -85,7 +85,7 @@ echom(Memory *m, Uint8 len, char *name)

 /* clang-format off */

-Uint8 mempeek8(Uint16 s) { return cpu.rom.dat[s] & 0xff; }

+Uint8 rampeek8(Uint16 s) { return cpu.ram.dat[s] & 0xff; }

 Uint16 mempeek16(Uint16 s) { return (cpu.rom.dat[s] << 8) + (cpu.rom.dat[s+1] & 0xff); }

 void wspush8(Uint8 b) { cpu.wst.dat[cpu.wst.ptr++] = b; }

 Uint8 wspop8(void) { return cpu.wst.dat[--cpu.wst.ptr]; }

@@ -158,6 +158,14 @@ error(char *name)

 	return 0;

 }

+int

+device1(Uint8 *read, Uint8 *write)

+{

+	printf("%c", *write);

+	*write = 0;

+	return 0;

+}

+

 int

 eval(void)

 {

@@ -192,12 +200,15 @@ start(FILE *f)

 	cpu.vframe = mempeek16(0xfffc);

 	cpu.verror = mempeek16(0xfffe);

 	/* eval reset */

-	printf("Phase: reset\n");

+	printf("\nPhase: reset\n");

 	cpu.rom.ptr = cpu.vreset;

-	while(!(cpu.status & FLAG_HALT) && eval())

-		;

+	while(!(cpu.status & FLAG_HALT) && eval()) {

+		/* experimental */

+		if(cpu.ram.dat[0xfff1])

+			device1(&cpu.ram.dat[0xfff0], &cpu.ram.dat[0xfff1]);

+	}

 	/*eval frame */

-	printf("Phase: frame\n");

+	printf("\nPhase: frame\n");

 	setflag(FLAG_HALT, 0);

 	cpu.rom.ptr = cpu.vframe;

 	while(!(cpu.status & FLAG_HALT) && eval())

@@ -148,6 +148,16 @@ pushshort(Uint16 s, int lit)

 	pushbyte(s & 0xff, 0);

 }

+void

+pushword(char *w)

+{

+	int i = slen(w);

+	pushbyte(0x02, 0);

+	pushbyte(slen(w), 0);

+	while(i > 0)

+		pushbyte(w[--i], 0);

+}

+

 Label *

 findlabel(char *s)

 {

@@ -228,6 +238,8 @@ pass1(FILE *f)

 			addr += 0;

 		else if(w[0] == '.')

 			addr += 2;

+		else if(w[0] == '"')

+			addr += slen(w + 1);

 		else if(w[0] == ',')

 			addr += 4;

 		else if(ismarker(w))

@@ -255,6 +267,8 @@ pass2(FILE *f)

 			p.ptr = shex(w + 1);

 		else if(w[0] == ':')

 			fscanf(f, "%s", w);

+		else if(w[0] == '"')

+			pushword(w + 1);

 		else if((op = findop(w)) || scmp(w, "BRK"))

 			pushbyte(op, 0);

 		else if((l = findlabel(w + 1)))